Build Log 07 Spindle and A/C Head Motion--  5 axis CNC for Santiago Perez's FabLab

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Build Log 07 Spindle and A/C Head Motion 2010

Some of Santiago's work with students can be seen here:
https://www.srplab.net/

https://www.youtube.com/@plab48

https://www.flickr.com/people/srplab/

   
https://www.flickr.com/photos/srplab/albums/72157626070158605

5 Axis Cnc for SrpLab's FabLab
Build Log 00--Design Log
Build Log 01 getting started and the table base
Build Log 02 gantry
Build Log 03 Y & Z carriages
Build Log 04 Motor brackets & gear systems
Build Log 05 manual motion
Build Log 06 A/C Head
Build Log 07 Spindle and A/C head motion
Build Log 08 Motors and wiring
Build Log 09 Electronics and control cabinet
Build Log 10 Self powered motion and testing
Build Log 11 Delivery and setup

Ok, so this video shows up in build log 5 & 6 too, but it was a bit of a milestone.  5 axis motion even it is manual.

So one issue was the electrical connector being too tight in the A fork.  The solution was to machine the restraining nut so that the cable could come out the side of it and then clear with enough tolerance.

The other issue was the coolant line fittings.  They were straight fittings from the factory but I was able to find some 90 degree hose barb fittings that could simply replace the factory ones and give us the needed clearance.

Right & Far Right:  you can see the initial clearance issue.

Right:  The first thought on the electrical plug was to replace the plug, but finding one that would fit the housing proved fruitless.

Far Right:  The two clearance problems came incorrect data on the dimensioned drawing of the spindle from the mfr. 

Right & Below:  The spindle did not come with a collet wrench and the flats are very narrow.  So the solution is to just plasma cut a wrench.

Right:  the cooling system had to be mounted as close to the spindle as possible because of the resistance in the coolant hoses.  Keeping them small was key to keep the flexibility for motion, but this creates back pressure in the lines and minimizes the length the hoses can be.  The mointing position worked out on the back side of the & carriage.  All of this adds weight to the top of the gantry and makes oscillations increase with lower frequency but greater amplitude.

Right:  Sketches for the cooling system and the final configuration in photos.

Far Right:  The spindle VFD--controller for the spindle motor--wiring for this &  mounting can be found in BuildLog09.

5 Axis Cnc for SrpLab's FabLab
Build Log 00--Design Log
Build Log 01 getting started and the table base
Build Log 02 gantry
Build Log 03 Y & Z carriages
Build Log 04 Motor brackets & gear systems
Build Log 05 manual motion
Build Log 06 A/C Head
Build Log 07 Spindle and A/C head motion
Build Log 08 Motors and wiring
Build Log 09 Electronics and control cabinet
Build Log 10 Self powered motion and testing
Build Log 11 Delivery and setup

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